林业科学2009，Vol.45Issue(10)：81-87,7.
机载激光雷达和航空数码影像单木树高提取
Extraction of Individual Tree Height Using a Combination of Aerial Digital Camera Imagery and LiDAR
摘要
Abstract
LiDAR (light detection and ranging) is an active remote sensing technique, LiDAR instruments measure the roundtrip time for a pulse of laser energy to travel between the sensor and a target, provide a distance or range from the instrument to the object. In this research individual tree height was measured by combining IiDAR and aerial digital camera imagery. According to the terrain, vegetation and other things of the surface, the IiDAR point clouds were filtered and classified. The Tin Filter algorithm was used for the extraction of ground points and vegetation points. Object-oriented methods were used to identify the single tree in digital camera imagery. Multi-scale and canopy mode were applied in the segmentation, and the nearest neighbors and member function methods were the main classification algorithm, and the edges of canopy polygons were optimized for improving the precision of single tree identification. The classified vegetation points were overlapped with the canopy polygons, and the max height in the polygon was calculated for the correlation with ground measured tree heights. The regression equation was established, and the mean evaluation precision was 74.89 % .关键词
机载激光雷达/航空数码影像/多尺度分割/树高Key words
LiDAR/aerial digital camera imagery/multi-scale segmentation/tree height分类
农业科技引用本文复制引用
赵峰,庞勇,李增元,张怀清,丰伟,刘清旺..机载激光雷达和航空数码影像单木树高提取[J].林业科学,2009,45(10):81-87,7.基金项目
国家863课题(2007AA12Z173,2005AA133011)共同资助. （2007AA12Z173,2005AA133011）
